ἀλάστωρ
ἀλάστωρ
the avenging deity, destroying angel, Trag.; ἀλ. οὑμός Soph.; βουκόλων ἀλάστωρ the herdsmenʼs plague, of the Nemean lion, Soph.
pass. he who suffers from such vengeance, an accursed wretch, Aesch., Dem.
Either from ἄλαστος, or from ἀλάομαι, he that makes to wander.